Valve-seat retainer



F. W. PARSONS. VALVE SEAT RETAINER.

APPLICATION FILED JAN-'19. I922.

Patented May -2, 1922.

INVENTOR fleiem'c]: WPa emi m5 ATTONEY STATES PATENT DFEFIC.

rannnurox w. reasons, or ELMI RA; NEW. vongnssrenon 'ro Incremen -BANDCOMPANY, or annsnv CITY, NEW J RSEY, aconronn'rron or NEW JERSEY.

' VALVE-SEAT R TAI ER;

harness.

, T 0 all whom it may concern Be it known that I, FR DE ICK W. PAR-soNs, a citizen of the United States, and a Valve-Seat Retainer, ofwhich the following is a specification, accompanied by drawings. ThlS.invention relates to compressors, but

more particularly to valve seat retalning de vices for retaining thevalveseats and valves in position in the valve openings in the inner 7wall of the compressor head until the covers:

and valve securing devices are adjusted on the outer wall or shell'ofthe compressor head. I

In a compressor head in which the valves, as for instance plate valves,are arranged radially about the longitudinalraxis of the head,difiiculty has been experienced in temporarily retaining or supportingthe valve seats, carrying valves, in the valveopenings on the lower sideof the head, whilethe cov ers and permanent valve seat holding de vices,usually in the form of studs passing through the covers, are beingadjusted inposition and secured in place.

These valve seats and valves-lying below the plane of the horizontalaxis of the machine, tend to fall outwardly -and downwardly while thecovers are being adjusted, and one usual method has been to looselysecure the valves to the valve securing cover studs and adjust thevalves and covers at the.

same time, but with valves of large diameter in particular, theadjustment of the valve seat and valve in its opening may not beaccurate, so that leakage or other more serious troubles result. Againthe workmancannot see what he is doing, since the cover obscures hisview through the outer cover opening In the head, and for this reason hemay not set the valve seat accurately in the inner opening.

The primary object of the present inven tion is to enable the valveseats to be accurately adjusted and temporarily retained in the valveseat openings, particularly in the underside of the inner wall of thehead,

while the covers are removed, so that the workman can plainly see the adustment and may afterwards secure the covers and per manent valvesecuring devices in position without disturbing the adjustment'alreadymade. This invention is in some respects a variation and improvementupon the valve Specification of Letters Batent,

Patented. May 2, 192,2.

Application filed January 19, 1,922.v Serial No. 530,350

seat retainer disclosed in my Patent No. 1,385,4c67 granted to me the26th day of July 1921;.

Further obj ectsof the invention willherenafter app ear', and to all ofthese ends the invention consists of the combination'of elementsfullydescribed and claimed in this specification and illustrated in one ofits preferred forms in the accompanying drawings, in which Figurel is adiagrammatic longitudinalsectional elevation partly broken away througha compressor head, showing my valve seat retainer in use,

Figure 2 is a side view in perspective of the valve seat retainer, and IFigure 3 is another perspective view of the valve, seat retainer. I

Referring to the drawings. a type of com pressor head A is shownsuitable for illustrating,the advantages and mode ofoperation of my,device, and I have. only chosen to show a portion of a head,iior'simplicity, it being understood however, that the invention may be,used with any type of head to which, it is found applicable. The head isadapted to be fitted to. a cylinder A having a, reciprocating piston A 1The head' illustrated 'sprovided. with the this instance carrying platevalves, of any suitable type. The openings B,.as shown, are providedwith the rabbeted or counterbored portions E, adapted to receive thegaskets E for seating the flanges F of the valve seats D. The inventionapplies equally to either inlet or discharge valves, and in thisinstance, for illustrative purposes, the upper valve is indicated as aninletvalve and the lower valve is shown as a discharge valve. The outerwall G of the head is provided withopenings H corresponding to theopenings B and the usual covers J, of which only one is shown, areprovided for closing the outer openings after the valve seats and valvesare in place. Adjustable holdin devices, preferably in the form of studs1 pass through each cover for securin the valve seats-in final positionand cover holdin means, which may be in the form of stu s L are providedon the outer wall.

In order to temporarily maintain the valve seats D inthe openings B inthe un- 110 metal, which may be carried in'anysuitable or convenientmanner by the valve Structure,

and is adapted to engage the outer wallof the compressor headfor'retaining the valve seat in position n-the valve seat open ng,-

until the coverand valve securing devices are adjusted. The springretainer may beprovided with a central aperture 0 adapted to be placedover the center bolt P of the valve, after which a screw"'-*handle' isscrewed over the center bolt P. The valve seat is' adjusted in positionby means of the handle Q care being taken not to dislodge the gasketE,As the'valve seat is adjusted, the'hooked ends R of the valveseatretainer will slip into place and engage the edge of the outer opening11 for the "cover, and will thus retain the valve seat in po'sitionafter the handle Q- is removed. The retainer L remains in position inthe head and a cover J may be adjusted in position, and the stud K orvalve securing device isscrewed down against the center bolt P to holdthe'valve seat permanently "in position in the usual manner. p p

In order to save metal, and yet procure v a valve seatretainer havingtapered; ends S,

producing increased resiliency, the strips from which the retainers aremade are pref erably cut from a-sheet of metalin' such manner that thesides a and b are parallel,

and thesides ,0 andrl are parallel; Assume for instance that the side ais the original end, of a sheet of metal from which the strips were cut,it"will be observed that the side I) is out parallel to the side a, andthenin order to make the tapered ends, the sides 0 valve, the outerWall'of the head having a I corresponding opening adapted to be closedby-a cover carrying an adjustable valve securing device, and a valveretainer in the form of a bow shaped spring clip carried by the valvestructure and adapted to engage the outer Wall of the compressor headand remain in the head for retaining the valve seat in-position in thevalve seat opening until the cover and valve securing device areadjusted.

2. In a compressor, a compressor head having a: valve seat opening inits inner wall adaptedto receive a valve seat-carrying a valve, theouter Wall of the head having a corresponding opening adaptedto beclosed by a cover carrying an adjustable valve securing device, and avalve retainer in the form of a bow shaped spring clip having hookedends, said spring retainer being carr'iedby the valve structure'and thehooked ends being adapted to engage the edge of the opening in theout'er wall of the com pressor head and remain in the head for retainingthe valve seat in position in the valve seat. opening until the coverand valve securing device are adjusted. v

i In testimony whereof I- have signed this specification. l

- FREDERICK W. PARSONS. I

